Make sure these conditions apply and you should manage:
-the size of the icons (66x50px and 32x24px)
-the name these icons named exactly like this (example): The 66x50px "CNN_B" and the 32x24px "CNN_U".
-file format has to be bitmap (.bmp).
-you add your own icons to the right folder...
-you have to restart Pronto Configurator after you have added your own icons to see the new ones.
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There is one thing that I'd like to get an answer to - how to wipe out "-" marks after channel icon and channel's name in the favorites list? Now I have ie. CNN - 8 and yes I can take off channel no.8 away in the Configurator but can't remove the "-".